The good news, it's beat any trick event with a gold.
The bad news. Gold is quite hard. You'll earn this after learning the game. But it's a skill challenge, but there's a few tricks to help boost your score.
First: Tweaking grabs = big points. Use the Right Trigger liberally on stunts. In addition vary your tricks if you're getting duplicate trick warnings.
Second: Full combo. You don't need to full combo from the beginning to the end. But your first trick will be kind of small, however if you get your multiplier up to 20x. 100K bonus points becomes 2 MILLION points. 200K becomes 4 million. These are lower ends of the numbers. So if you hold that combo til the end of the map, you'll usually end up with super sized scores. At the very least hold the combo til you're in the 17-20x range.
Third: Speaking of Multipliers. Those are your friend. Big tricks gives you a higher multipler, staying in one area lowers it. You don't have to race through the map, but keep moving, and keep doing big tricks. You want 20x if possible by the end of the course. If you can get 20x and a full combo you'll likely beat most runs.
Fourth PRACTICE! Just keep restarting the run until you get a good feel, there are places where you need to nose press or tail press (pressing B or X on the ground) to keep your combo going, and there's places where you should just get speed to get more air. Hit every jump possible, and even the side of the jump allows you to pull small tricks.
After beating the career mode, this only took me 4 attempts. It's really easy once you learn how to focus your tricks, and build your multipliers, but it will still take a couple tries the first time.